CVE-2026-121528 ← All CVEs & products

Posts about CVE-2026-121528

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High Nov 10, 2026

FortiOS SSLVPN certificate validation flaw: check affected versions and upgrade

Fortinet disclosed CVE-2026-121528, an improper certificate validation flaw in FortiOS SSLVPN that may let an unauthenticated remote attacker perform a Man-in-the-Middle attack. Check affected branches and upgrade to a fixed release.

CVE-2026-121528 FortiOS